Heap Memory (CloudMonk.io)

Heap (programming)



Return to Memory management, Heap memory vs. Stack memory, Heap (data structure), Heap or Free store (Heap-based memory allocation), Stack (Call stack - Stack-based memory allocation - Stack (abstract data type) - LIFO (computing) - Stack frame - Stack unwinding), Data Structures

The task of fulfilling an allocation request consists of locating a block of unused memory of sufficient size. Memory requests are satisfied by allocating portions from a large pool[note 2] of memory called the heap[note 3] or free store. At any given time, some parts of the heap are in use, while some are "free" (unused) and thus available for future allocations.

Several issues complicate the implementation, such as external fragmentation, which arises when there are many small gaps between allocated memory blocks, which invalidates their use for an allocation request. The allocator's metadata can also inflate the size of (individually) small allocations. This is often managed by chunking. The memory management system must track outstanding allocations to ensure that they do not overlap and that no memory is ever "lost" (i.e. that there are no "memory leaks").

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Memory management: Dynamic memory management, C language memory management, C dynamic memory allocation - C memory (malloc, realloc, calloc, C free, mimalloc), C Plus Plus memory | C++ memory (automatic storage duration, C Plus Plus auto | C++ auto, RAII), C Sharp memory | C# memory, Binary prefixes (kilo-mega-giga-tera-peta-exa-zetta-yotta), Manual memory management, Memory management (operating systems) (Linux memory - UNIX memory, Android memory, IBM mainframe memory, iOS memory, macOS memory, Windows memory), Memory: Memory address, Address space, Memory allocation - Memory allocator, Bash memory, Memory deallocation - Deallocation, Memory debugger (Memwatch, mtrace), Memory diffusion, Dynamic memory, Memory fence (Memory barrier), Memory fragmentation] - Fragmentation, Free list, Garbage collection - Garbage collector, Golang memory, Heap or Free store (Heap-based memory allocation), Stack (Call stack - Stack-based memory allocation - Stack (abstract data type) - LIFO (computing) - Stack frame - Stack unwinding), JVM memory (Java memory - Kotlin memory - Scala memory), Memory leak, Memory model, Memory paging, Out of memory, Page (computer memory), Pointers, C language pointers, Automatic pointer, Pointer swizzling, Memory pool, Memory protection, Physical memory, PowerShell memory, Python memory, RAM, Memory reference (Reference counting - Soft reference - Weak reference), Resource allocation (Resource Acquisition Is Initialization - RAII), Resource leak, Rust memory, Memory segmentation, Memory utilization, Shared memory, Static variable - Automatic variable, Virtual memory, Virtual address space. Category of Memory management. (navbar_memory_management. See also navbar_memory or navbar_data_storage)




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Composite Types or Non-Primitive Types: Array data structure, String (computer science) (Array of characters), Record (computer science) (also called Struct (C programming language)), Union type (Tagged union, also called Variant type, Variant record, Discriminated union, or Disjoint union);





Abstract Data Types: Container (data structure), List (abstract data type), Tuple, Associative array (also called Map, Multimap, Set (abstract data type), Multiset (abstract data type) (also called Multiset (bag)), Stack (abstract data type), Queue (abstract data type), (e.g. Priority queue), Double-ended queue, Graph (data structure) (e.g. Tree (data structure), Heap (data structure))





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